Core-making machine.



PATENTBD MAY 5,, 1-908. 0. H, BLAU & G. W. KELLY.

GORE MAKING MACHINE. APPLICATION FILED JULY 11.1806. RENEWED NOV.4, 1907.

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UNTTEE STATES PATENT oEEioE.

CHARLES H. BLAU AND GEORGE W. KELLY, OF COLUMBUS, GEORGIA.

CORE-MAKING- MACHINE Application filed July 11, 1906. Serial No. 325,595.

To all whom it may concern:

Be it known that we, OHARLEs I-I. BLAU and GEORGE W. KELLY, residing at Columbus, in the county of Muscogee and State of Geor ia, have invented certain new and useful Improvements in Core-Molding Machines; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to machines used in metal foundries for molding cores by expressing sand through suitable dies; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed.

In the drawings, Figure 1 is a longitudinal section through the machine. Fig. 2 is an end view showing the support for the core tray in section. Fig. 3 is a view of the opposite end of the machine from that shown in Fig. 2, and showing the hub of the flywheel in section.

A is the hopper in which a mixture of sand with other ingredients, suitable for forming cores, is placed. B is the sand chamber below the said ho per. The chamber B is provided with a c amp C at one end and this clamp is preferably cylindrical. The clamp is split upon one side, and it is provided with lugs l) and a clamping screw 0.

D is a die having an enlargement d at one end which is adjustable longitudinally in the clamp C. When the position of the die has been adjusted it is clamped to the sand chamber by means of the clamping screw and clam E is a revoluble sleeve which is journalec in bearings e at the other end of the said chamber from the die, and which is provided with a rectangular driving socket e.

F is the packing-screw which is provided with a rectangular driving projection f which is slidable in the socket e.

F is a thrust screw which engages with the end portion of the sleeve and which bears against the end of the projection f so that the a position of the packing-screw may be adjusted.

The packing-screw extends through the sand chamber and projects partway through the die. A vent former f is secured centrally of the said packing-screw in the other end ortion of the die, and it consists of a small rod. The packing-screw and its die are made of various sizes to form cores of Specification of Letters Patent.

Patented May 5, 1908.

Renewed November 4, 1907. Serial No. 400,552.

corresponding size, and all the dies have similar enlargements d which are adjustable in the clamp C.

G is a toothed pinion secured on the sleeve E, and g is a toothed wheel which gears into the pinion G. The wheel g is secured on the hub 7b of a fly-wheel H, and the said hub is journaled on a pin h which projects from the to be adjusted so that the handle may be placed at different distances from the center of the fiy-wheel, according to the resistance of the sand in the machine.

K is a tray or plate for receiving the cores which are expressed from the die. This tray is secured to a supporting bracket is which is slidable longitudinally upon a guide 7c. This guide is arranged in an inclined position, and it is secured to the base B below the die.

L is a bolt provided with a thumb-nut for securing the bracket to the guide. The guide is preferably provided with two parallel tracks or bars upon which the base of the bracket is slidable, and the clamping bolt is arranged between the said bars.

The tray is adjusted to the die by sliding the bracket on the guide to the position shown in the drawings.

The core-sand is fed from the sand chamber into the die by the screw which acks it in the die. The density of the core depends upon the length of the space :0 between the end of the packing screw and the delivery end of the die. IVhen the length of this space is increased the frictional resistance of the sides of the die to the sand is also increased, and the core is consequently more dense. Various mixtures of sand withother materials are used to form the core-sand according to the size of the core and the use to which it is to be put, and it is very important to be able to form the cores of any prear ranged density. 7

The length of the consolidating space :6 is varied by sliding the die in the clamp before securing it by the clamping screw. A finer adjustment of the space a is obtained by means of the screw F which slides the packing-screw to a limited extent in the die, and this adjustment may be effected at any time without unclamping the die.

What we claim is:

1. In a core molding machine, the combination, with a sand chamber provided at one end with a clamp, of a die adjustable longitudinally in the said clam a driving-sleevej ournaled at the other en of the said chamber and provided with means for revolving it, a packing screw 0 eratively engaging with the said sleeve an projecting through the said chamber and engaging with the said die, and an adjusting screw bearing against the end of the said packing-screw and engaging with the end of the said sleeve.

2. In a core molding machine, the combination, with a sand chamber provided with a die at its front end, of a driving sleeve journaled at the other end of the said chamber and provided with means for revolving it, a packing-screw o eratively engaging with the said sleeve, and a screw for adjusting the said packing-screw longitudinally, engaging with the end of the said sleeve and bearing endwise against the said packing screw.

3. In a core molding machine, the combi nation, with a sand chamber and a die at one end thereof, of a sleeve journaled at the other end of the said chamber and provided with a driving device, a packing screw working in the said chamber and die and also prothereto, and a revoluble packing-screw work- I ing in the said chamber and die; of an inclined guide secured to the said sand chamber, and a sup ort for receiving the core from the said die a justable on the said. guide.

5. In a core molding machine, the combination, with a sand chamber, a die secured thereto, and a revoluble packing-screw working in the said chamber and die; of an inclined guide secured to the said sand chamber, a supporting bracket adjustable on the said guide and provided with a fastening device, and a core-receiving tray carried by the said bracket.

In testimony whereof We affix oursignatures, in presence of two Witnesses.

CHAS. I-I. BLAU. GEO. W. KELLY.

Witnesses H. T. MORREFIELD, WALTER E. MCORARY. 

